Wat is de amplitude en periode van y = -4cos2x?

Wat is de amplitude en periode van y = -4cos2x?
Anonim

Antwoord:

# 4, pi #

Uitleg:

# "de standaardvorm van de cosinus is" #

#color (rood) (balk (ul (| kleur (wit) (2/2) kleur (zwart) (y = acos (bx + c) + d) kleur (wit) (02/02) |))) #

# "amplitude" = | a |, "period" = (2pi) / b #

# "faseverschuiving" = -c / b, "verticale verschuiving" = d #

# "hier" a = -4, b = 2, c = d = 0 #

#rArr "amplitude" = | -4 | = 4, "periode" = (2pi) / 2 = pi #